idk but if u boil the pocket, put a ball in the pocket, and stick a butter knife between the mesh and the head so that the knife is holding the ball in, if you leave it over night it should get a better pocket.

I got this, and I can say hands down, that STX has the BEST ballstops in the game. I see my game improving everytime I put a ballstop on one of my sticks. Everyone should get this, and throw away the mesh and strings, because it's all a gimmick, and the ballstop is what you really want.